AP2127K-4.75TRG1

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PMIC (Power Management Integrated Circuits) provides power supply and regulation functions that ensure efficient and reliable operation of electronic applications. The variety of applications and their requirements needs to be considered when selecting a suitable PMIC. Amongst a range of options available, linear regulators are typically used for system-level regulation because of their low cost and ease of use. This article will discuss the application field and working principle of AP2127K-4.75TRG1, a linear voltage regulator.

AP2127K-4.75TRG1 is a positive linear voltage regulator which features adjustable output voltage and high power, allowing it to provide a relative wide range of voltage for the application. This includes adjustable output voltage range from 1.25V to 20V with 0.9V reference voltage and output current up to 3A. This makes it suitable for various application, such as embedded system, intelligent dispenser machines, communication systems and power supply modules, as it can provide constant and stable power supply without wasting too much electric energy.

In terms of its technical characteristics, AP2127K-4.75TRG1 has an ultra-low dropout voltage, up to 0.5V. Besides, the low operating quiescent current of 20uA and low shutdown current of 20uA make it an ideal choice for battery-operated systems. It also has comprehensive protection features including input overvoltage protection, output inrush current limiter, over-current protection and thermal shutdown protection.

The working principle of a linear voltage regulator is relatively simple. A differential amplifier compares the feedback voltage VFB to the reference voltage VREF, creating a voltage difference VDIFF. The voltage difference VDICT then drives the internal pass transistor which reduces the input voltage VIN to the required output voltage VOUT. The entire regulation process recycles the extra voltage back to the input power source, making it very efficient in terms of energy conservation. However, this process results in a voltage drop at the pass transistor which is known as the drop-out voltage. The lower the drop-out voltage, the higher the efficiency.

In conclusion, AP2127K-4.75TRG1 is a linear voltage regulator suitable for a wide range of applications such as embedded systems, intelligent dispenser machines, communication systems and power supply modules due to its adjustable output voltage range and high power capacity. Additionally, it offers extended system protection and low power consumption with its adjustable dropout voltage and low quiescent current. It is thus able to provide a clean and stable power supply for any electronic application.

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